Initial version of pcied (#60)

* Initial version of pcied

* Fix LGTM error

* Fix LGTM issues

* Update to read the state_db for the pcie device status check after
calling `pcieutil pcie-check`.

* fix LGTM

* Update the pcie_status in STATE_DB

* Add logic to exit the daemon if the pcie configuration file doesn't exist.

* review comments - spaces

* review comments

* fixed lgtm

* typo

* typo

* use subprocess call

* review comment

sonic-pcied/scripts/pcied

@@ -0,0 +1,136 @@
+#!/usr/bin/env python2
+
+"""
+    pcied
+    PCIe device monitoring daemon for SONiC
+"""
+
+try:
+    import os
+    import signal
+    import subprocess
+    import sys
+    import threading
+
+    import swsssdk
+    from sonic_daemon_base.daemon_base import Logger
+    from sonic_daemon_base.daemon_base import DaemonBase
+except ImportError, e:
+    raise ImportError(str(e) + " - required module not found")
+
+#
+# Constants ====================================================================
+#
+SYSLOG_IDENTIFIER = "pcied"
+
+PCIE_RESULT_REGEX = "PCIe Device Checking All Test"
+PCIE_TABLE_NAME = "PCIE_STATUS"
+
+PLATFORM_ROOT_PATH = '/usr/share/sonic/device'
+PCIE_CONF_FILE = 'pcie.yaml'
+SONIC_CFGGEN_PATH = '/usr/local/bin/sonic-cfggen'
+HWSKU_KEY = 'DEVICE_METADATA.localhost.hwsku'
+PLATFORM_KEY = 'DEVICE_METADATA.localhost.platform'
+
+PCIED_MAIN_THREAD_SLEEP_SECS = 60
+REDIS_HOSTIP = "127.0.0.1"
+
+# Global logger class instance
+logger = Logger(SYSLOG_IDENTIFIER)
+
+#
+# Daemon =======================================================================
+#
+
+
+class DaemonPcied(DaemonBase):
+    def __init__(self):
+        DaemonBase.__init__(self)
+
+        platform, hwsku = DaemonBase.get_platform_and_hwsku(self)
+        pciefilePath = "/".join([PLATFORM_ROOT_PATH, platform, "plugins", PCIE_CONF_FILE])
+        sys.path.append(os.path.abspath(pciefilePath))
+        if not os.path.exists(pciefilePath):
+            logger.log_error("Platform pcie configuration file doesn't exist! exit pcied")
+            sys.exit("Platform PCIe Configuration file doesn't exist!")
+
+        self.timeout = PCIED_MAIN_THREAD_SLEEP_SECS
+        self.stop_event = threading.Event()
+
+        self.state_db = swsssdk.SonicV2Connector(host=REDIS_HOSTIP)
+        self.state_db.connect("STATE_DB")
+
+    def check_pcie_devices(self):
+        cmd = [ 'sudo', 'pcieutil', 'pcie-check' ]
+        p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        resultInfo, err = p.communicate()
+        pcie_db_state = self.read_state_db("PCIE_STATUS|", "PCIE_DEVICES")
+
+        for line in resultInfo.splitlines():
+            if PCIE_RESULT_REGEX in line:
+                if "PASSED" in line and "PASSED" not in pcie_db_state:
+                    self.update_state_db("PCIE_STATUS|", "PCIE_DEVICES", "PASSED")
+                    logger.log_info("PCIe device status check : PASSED")
+                elif "FAILED" in line and "PASSED" in pcie_db_state:
+                    self.update_state_db("PCIE_STATUS|", "PCIE_DEVICES", "FAILED")
+                    logger.log_info("PCIe device status check : FAILED")
+
+    def read_state_db(self, key1, key2):
+        return self.state_db.get('STATE_DB', key1, key2)
+
+    def update_state_db(self, key1, key2, value):
+        self.state_db.set('STATE_DB', key1, key2, value)
+
+    # Signal handler
+    def signal_handler(self, sig, frame):
+        if sig == signal.SIGHUP:
+            logger.log_info("Caught SIGHUP - ignoring...")
+        elif sig == signal.SIGINT:
+            logger.log_info("Caught SIGINT - exiting...")
+            self.stop_event.set()
+        elif sig == signal.SIGTERM:
+            logger.log_info("Caught SIGTERM - exiting...")
+            self.stop_event.set()
+        else:
+            logger.log_warning("Caught unhandled signal '" + sig + "'")
+
+    # Initialize daemon
+    def init(self):
+        logger.log_info("Start daemon init...")
+
+    # Deinitialize daemon
+    def deinit(self):
+        logger.log_info("Start daemon deinit...")
+
+    # Run daemon
+    def run(self):
+        logger.log_info("Starting up...")
+
+        # Start daemon initialization sequence
+        self.init()
+
+        # Start main loop
+        logger.log_info("Start daemon main loop")
+
+        while not self.stop_event.wait(self.timeout):
+            # Check the Pcie device status
+            self.check_pcie_devices()
+
+        logger.log_info("Stop daemon main loop")
+
+        # Start daemon deinitialization sequence
+        self.deinit()
+
+        logger.log_info("Shutting down...")
+
+#
+# Main =========================================================================
+#
+
+
+def main():
+    pcied = DaemonPcied()
+    pcied.run()
+
+if __name__ == '__main__':
+    main()

sonic-pcied/setup.py

@@ -0,0 +1,29 @@
+from setuptools import setup
+
+setup(
+    name='sonic-pcied',
+    version='1.0',
+    description='PCIe check daemon for SONiC',
+    license='Apache 2.0',
+    author='SONiC Team',
+    author_email='linuxnetdev@microsoft.com',
+    url='https://github.com/Azure/sonic-platform-daemons',
+    maintainer='Sujin Kang',
+    maintainer_email='sujkang@microsoft.com',
+    scripts=[
+        'scripts/pcied',
+    ],
+    classifiers=[
+        'Development Status :: 4 - Beta',
+        'Environment :: No Input/Output (Daemon)',
+        'Intended Audience :: Developers',
+        'Intended Audience :: Information Technology',
+        'Intended Audience :: System Administrators',
+        'License :: OSI Approved :: Apache Software License',
+        'Natural Language :: English',
+        'Operating System :: POSIX :: Linux',
+        'Programming Language :: Python :: 2.7',
+        'Topic :: System :: Hardware',
+    ],
+    keywords='sonic SONiC PCIe pcie PCIED pcied',
+)